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Fu Z, Chen J, Chen X, Sun Y, Wang F, Yang J. Exploring the Application of Terahertz Metamaterials Based on Metallic Strip Structures in Detection of Reverse Micelles. BIOSENSORS 2024; 14:338. [PMID: 39056614 PMCID: PMC11275120 DOI: 10.3390/bios14070338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 07/05/2024] [Accepted: 07/06/2024] [Indexed: 07/28/2024]
Abstract
Terahertz spectroscopy has unique advantages in the study of biological molecules in aqueous solutions. However, water has a strong absorption capability in the terahertz region. Reducing the amount of liquid could decrease interference with the terahertz wave, which may, however, affect the measurement accuracy. Therefore, it is particularly important to balance the amount and water content of liquid samples. In this work, a terahertz metamaterial sensor based on metallic strips is designed, fabricated, and used to detect reverse micelles. An aqueous confinement environment in reverse micelles can improve the signal-to-noise ratio of the terahertz response. Due to "water pool" trapped in reverse micelles, the DOPC (1,2-dioleoyl-sn-glycero-3-phosphocholine) solution and DOPC emulsion can successfully be identified in intensity by terahertz spectroscopy. Combined with the metamaterial sensor, an obvious frequency shift of 30 GHz can be achieved to distinguish the DOPC emulsion (5%) from the DOPC solution. This approach may provide a potential way for improving the sensitivity of detecting trace elements in a buffer solution, thus offering a valuable toolkit toward bioanalytical applications.
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Affiliation(s)
| | | | | | | | | | - Jing Yang
- College of Science, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China; (Z.F.); (J.C.); (X.C.); (Y.S.); (F.W.)
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2
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Jang T, Lee S, Pang Y. Anomalous proton transfer of a photoacid HPTS in nonaqueous reverse micelles. Phys Chem Chem Phys 2024; 26:11283-11294. [PMID: 38456549 DOI: 10.1039/d3cp05710k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
The proton transfer reaction is one of the fundamental chemical reactions where the reaction dynamics strongly depend on solvent properties such as acidity or basicity. A photoacid 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS) shows a sharp decrease of pKa (7.7 → 0.5) upon photoexcitation, and the excited-state proton transfer (ESPT) occurs with ultrafast time constants of 2.5 and 89 ps in bulk aqueous solution. However, the two-step proton transfers via the contact ion pair formation and the proton diffusion are strongly limited inside the nanopools of reverse micelles (RMs). The confinement in small RMs strongly impeded the proton transfer reactions. In this work, we report the ESPT of HPTS confined in methanol-in-oil RMs by steady-state and time-resolved electronic spectroscopy. Interestingly, HPTS shows substantial deprotonation in the excited state only in small RMs, while the ESPT of HPTS does not occur in bulk methanol solution due to the low basicity of aliphatic alcohols. The kinetic analysis of time-resolved fluorescence and transient absorption measurements will compare the proton transfer dynamics of HPTS in the water-in-oil and methanol-in-oil RMs. The ESPT of photoacids, especially in the nonaqueous RMs, can be crucial in understanding many important chemical reactions involving proton transfer in the confined environments of cells and membranes.
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Affiliation(s)
- Taehyung Jang
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Sebok Lee
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Yoonsoo Pang
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
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3
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Walters SH, Castillo AJ, Develin AM, Labrecque CL, Qu Y, Fuglestad B. Investigating protein-membrane interactions using native reverse micelles constructed from naturally sourced lipids. Protein Sci 2023; 32:e4786. [PMID: 37746759 PMCID: PMC10578115 DOI: 10.1002/pro.4786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 09/26/2023]
Abstract
Advancing the study of membrane associated proteins and their interactions is dependent on accurate membrane models. While a variety of membrane models for high-resolution membrane protein study exist, most do not reflect the diversity of lipids found within biological membranes. In this work, we have developed native reverse micelles (nRMs) formulated with lipids from multiple eukaryotic sources, which encapsulate proteins and enable them to interact as they would with a biological membrane. Diverse formulations of nRMs using soy lecithin, porcine brain lipids, or bovine heart lipids combined with n-dodecylphosphocholine were developed and characterized by dynamic light scattering and 31 P-NMR. To optimize protein encapsulation, ubiquitin was used as a standard and protein NMR verified minimal changes to its structure. Peripheral membrane proteins, which bind reversibly to membranes, were encapsulated and include glutathione peroxidase 4 (GPx4), phosphatidylethanolamine-binding protein 1 (PEBP1), and fatty acid binding protein 4 (FABP4). All three proteins showed anticipated interactions with the membrane-like inner surface of the nRMs as assessed by protein NMR. The nRM formulations developed here allow for efficient, high-resolution study of membrane interacting proteins up to and beyond ~21 kDa, in a more biologically relevant context compared to other non-native membrane models. The approach outlined here may be applied to a wide range of lipid extracts, allowing study of a variety of membrane associated proteins in their specific biological context.
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Affiliation(s)
- Sara H. Walters
- Department of ChemistryVirginia Commonwealth UniversityRichmondVirginiaUSA
| | - Abdul J. Castillo
- Department of ChemistryVirginia Commonwealth UniversityRichmondVirginiaUSA
| | - Angela M. Develin
- Department of ChemistryVirginia Commonwealth UniversityRichmondVirginiaUSA
| | | | - Yun Qu
- Department of ChemistryVirginia Commonwealth UniversityRichmondVirginiaUSA
| | - Brian Fuglestad
- Department of ChemistryVirginia Commonwealth UniversityRichmondVirginiaUSA
- Institute for Structural Biology, Drug Discovery and DevelopmentVirginia Commonwealth UniversityRichmondVirginiaUSA
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4
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Garrett P, Shirley JC, Baiz CR. Forced Interactions: Ionic Polymers at Charged Surfactant Interfaces. J Phys Chem B 2023; 127:2829-2836. [PMID: 36926899 DOI: 10.1021/acs.jpcb.2c08636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Characterizing electrostatic interactions at heterogeneous interfaces is critical for developing a fundamental description of the dynamic processes at charged interfaces. Water-in-oil reverse micelles (RMs) offer a high degree of tunability across composition, polarity, and temperature, making them ideal systems for studying interactions at heterogeneous liquid-liquid interfaces. In the present study, we use a combination of ultrafast two-dimensional infrared spectroscopy and molecular dynamics (MD) simulations to determine the picosecond interfacial dynamics in RMs containing binary compositions of sorbitan monostearate and anionic or cationic cosurfactants, which are used to tune the ratio of charged to nonionic surfactants at the interface. The positively charged polyethylenimine (PEI) polymer is encapsulated within the RMs, and the carbonyl stretching mode of sorbitan monostearate reports on the interfacial hydrogen-bond populations and dynamics. The results show that hydrogen-bond populations are altered through the inclusion of both negatively and positively charged cosurfactants. Charged surfactants increase interfacial water penetration into the surfactant layer, and the surface localization of polymers decreases water penetration. Local hydrogen-bond dynamics undergo a slowdown with the inclusion of charged surfactants, and the encapsulation of polymers results in similar effects, irrespective of the charge.
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Affiliation(s)
- Paul Garrett
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Joseph C Shirley
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Carlos R Baiz
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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5
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Nakama T, Rossen A, Ebihara R, Yagi-Utsumi M, Fujita D, Kato K, Sato S, Fujita M. Hysteresis behavior in the unfolding/refolding processes of a protein trapped in metallo-cages. Chem Sci 2023; 14:2910-2914. [PMID: 36937586 PMCID: PMC10016334 DOI: 10.1039/d2sc05879k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Confinement of molecules in a synthetic host can physically isolate even their unstable temporary structures, which has potential for application to protein transient structure analysis. Here we report the NMR snapshot observation of protein unfolding and refolding processes by confining a target protein in a self-assembled coordination cage. With increasing acetonitrile content in CD3CN/H2O media (50 to 90 vol%), the folding structure of a protein sharply denatured at 83 vol%, clearly revealing the regions of initial unfolding. Unfavorable aggregation of the protein leading to irreversible precipitation is completely prevented because of the spatial isolation of the single protein molecule in the cage. When the acetonitrile content reversed (84 to 70 vol%), the once-denatured protein started to regain its original folded structure at 80 vol%, showing that the protein folding/unfolding process can be referred to as a phase transition with hysteresis behavior.
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Affiliation(s)
- Takahiro Nakama
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Anouk Rossen
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Risa Ebihara
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Maho Yagi-Utsumi
- Institute for Molecular Science (IMS) 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
- Exploratory Research Center on Life and Living Systems (ExCELLS) 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University 3-1 Tanabe-dori, Mizuho-ku Nagoya 467-8603 Japan
| | - Daishi Fujita
- Institute for Integrated Cell-Material Sciences (iCeMS), Institute for Advanced Study, Kyoto University Yoshida, Sakyo-ku Kyoto 606-8501 Japan
| | - Koichi Kato
- Institute for Molecular Science (IMS) 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
- Exploratory Research Center on Life and Living Systems (ExCELLS) 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University 3-1 Tanabe-dori, Mizuho-ku Nagoya 467-8603 Japan
| | - Sota Sato
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Makoto Fujita
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
- Institute for Molecular Science (IMS) 5-1 Higashiyama, Myodaiji Okazaki Aichi 444-8787 Japan
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6
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Zhao Y, Tian R, Xu Z, Jiang L, Sui X. Recent advances in soy protein extraction technology. J AM OIL CHEM SOC 2022. [DOI: 10.1002/aocs.12676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yuan Zhao
- College of Food Science Northeast Agricultural University Harbin China
| | - Ran Tian
- College of Food Science Northeast Agricultural University Harbin China
| | - Zejian Xu
- College of Food Science Northeast Agricultural University Harbin China
| | - Lianzhou Jiang
- College of Food Science Northeast Agricultural University Harbin China
| | - Xiaonan Sui
- College of Food Science Northeast Agricultural University Harbin China
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7
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Khamari L, Mukherjee S. Deciphering the Nanoconfinement Effect on the Folding Pathway of c-MYC Promoter-Based Intercalated-Motif DNA by Single-Molecule Förster Resonance Energy Transfer. J Phys Chem Lett 2022; 13:8169-8176. [PMID: 36005552 DOI: 10.1021/acs.jpclett.2c01893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Intercalated-motif (i-motif) DNA formed by cytosine (C)-rich sequences has been considered a novel target in anticancer research. Interestingly, this type of noncanonical DNA structure is highly dynamic and can display several conformational polymorphisms based on the immediate surrounding environment. However, studies regarding the folding pathway of i-motifs having disease-specific sequences under a confined environment at physiological pH are relatively scarce. This thereby warrants more explorations that will decipher their structural and functional properties inside constrained media. Herein, using the single-molecule Förster Resonance Energy Transfer (smFRET) studies, for the first time, we have illustrated the conformational dynamics of c-MYC promoter-based i-motif structures at physiological pH inside microemulsions of different dimensions. We concluded that the folding of such motifs under confined space is not a direct transition between the random coil and i-motif conformations; rather it occurs through a partially folded intermediate, depending on the confined dimension.
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Affiliation(s)
- Laxmikanta Khamari
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
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8
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Abedanzadeh S, Moosavi-Movahedi Z, Sheibani N, Moosavi-Movahedi AA. Nanozymes: Supramolecular perspective. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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9
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Finding or Creating a Living Organism? Past and Future Thought Experiments in Astrobiology Applied to Artificial Intelligence. Acta Biotheor 2022; 70:13. [PMID: 35482102 DOI: 10.1007/s10441-022-09438-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 04/15/2022] [Accepted: 04/21/2022] [Indexed: 11/01/2022]
Abstract
This is a digest of how various researchers in biology and astrobiology have explored questions of what defines living organisms-definitions based on functions or structures observed in organisms, or on systems terms, or on mathematical conceptions like closure, chirality, quantum mechanics and thermodynamics, or on biosemiotics, or on Darwinian evolution-to clarify the field and make it easier for endeavors in artificial intelligence to make progress. Current ideas are described to promote work between astrobiologists and computer scientists, each concerned with living organisms. A four-parameter framework is presented as a scaffold that is later developed into what machines lack to be considered alive: systems, evolution, energy and consciousness, and includes Jagers operators and the idea of dual closure. A novel definition of consciousness is developed which describes mental objects both with and without communicable properties, and this helps to clarify how consciousness in machines may be studied as an emergent process related to choice functions in systems. A perspective on how quantization, acting on nucleic acids, sets up natural limits to system behavior is offered as a partial address to the problem of biogenesis.
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10
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Garrett P, Baiz CR. Dynamic effect of polymers at the surfactant-water interface: an ultrafast study. SOFT MATTER 2022; 18:1793-1800. [PMID: 35170620 DOI: 10.1039/d1sm01651b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Interfaces play a role in controlling the rates and outcomes of chemical processes. Characterizing the interactions at heterogeneous interfaces is critical to developing a comprehensive model of the role of interfaces and confinement in modulating chemical reactions. Reverse micelles are an ideal model system for exploring the effect of encapsulated species on interfacial environments. Here, we use a combination of ultrafast two-dimensional infrared (2D IR) spectroscopy and molecular dynamics (MD) simulations to characterize the picosecond interfacial dynamics in reverse micelles (RMs) containing acrylamide monomers and polyacrylamide polymers within the aqueous phase. The ester carbonyl vibrations of the sorbitan monostearate surfactants are examined to extract interfacial hydrogen-bonding populations and dynamics. Hydrogen bond populations at the ester carbonyl positions remain unchanged with the inclusion of either polymer or monomer species. Hydrogen-bond dynamics are not altered with the addition of monomer but are slowed down twofold in the presence of encapsulated polyacrylamide polymer species as a result of polymer chains partially localizing to the interface. These findings imply that kinetics of reactions that occur at interfaces or in confined environments could be modulated by interfacial localization of the different components.
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Affiliation(s)
- Paul Garrett
- Department of Chemistry, The University of Texas at Austin, Austin, TX, USA.
| | - Carlos R Baiz
- Department of Chemistry, The University of Texas at Austin, Austin, TX, USA.
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11
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Nho HW, Adhikari A, Kwon OH. Ultrafast Excited-State Proton Transfer of a Cationic Superphotoacid in a Nanoscopic Water Pool. J Phys Chem B 2022; 126:1275-1283. [PMID: 35119852 DOI: 10.1021/acs.jpcb.1c09070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The excited-state proton transfer (ESPT) of a cationic superphotoacid, N-methyl-7-hydroxyquinolium, was studied within the water pool of an anionic aerosol-OT (AOT), bis(2-ethylhexyl) sulfosuccinate, reverse micelle (RM). Previously, we had found that the cationic photoacid residing at the anionic AOT interface was conducive to ESPT to the bound water having concentric heterogeneity on the time scale of hundreds of picoseconds to nanoseconds. In our present study, on the time scale of hundreds of femtoseconds to a few tens of picoseconds, the photoacid underwent an ultrafast ESPT influenced by mobile water constituting the core of the RM. The two subpopulations of the core water molecules that determine the ultrafast biphasic deprotonation of the photoacid on time scales differing by an order of magnitude were identified. The core water molecules solvating the counteranion of the photoacid showed a higher basicity than typical water clusters in bulk resulting in ESPT on a subpicosecond time scale. Bare water clusters sensed by the photoacid showed a slower ESPT, over several picoseconds, as typically limited by the rotational motion of water molecules for similar types of the photoacid.
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Affiliation(s)
- Hak-Won Nho
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.,Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Aniruddha Adhikari
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Oh-Hoon Kwon
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.,Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
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12
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Gale CD, Derakhshani-Molayousefi M, Levinger NE. How to Characterize Amorphous Shapes: The Tale of a Reverse Micelle. J Phys Chem B 2022; 126:953-963. [PMID: 35080415 DOI: 10.1021/acs.jpcb.1c09439] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Aerosol-OT reverse micelles represent a chemical construct where surfactant molecules self-assemble to stabilize water nanodroplets 1-10 nm in diameter. Although commonly assumed to adopt a spherical shape, all-atom molecular dynamics simulations and some experimental studies predict a nonspherical shape. If these aggregates are not spherical, then what shape do they take? Because the tools needed to evaluate the shape of something that lacks regular structure, order, or symmetry are not well developed, we present a set of three intuitive metrics─coordinate-pair eccentricity, convexity, and the curvature distribution─that estimate the shape of an amorphous object, and we demonstrate their use on a simulated aerosol-OT reverse micelle. These metrics are all well-established methods and principles in mathematics, and each provides unique information about the shape. Together, these metrics provide intuitive descriptions of amorphous shapes, facilitate ways to quantify those shapes, and follow their changes over time.
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Affiliation(s)
- Christopher D Gale
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | | | - Nancy E Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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Chang HW, Ma HI, Wu YS, Lee MC, Chung-Yueh Yuan E, Huang SJ, Cheng YS, Wu MH, Tu LH, Chan JCC. Site specific NMR characterization of abeta-40 oligomers cross seeded by abeta-42 oligomers. Chem Sci 2022; 13:8526-8535. [PMID: 35974768 PMCID: PMC9337746 DOI: 10.1039/d2sc01555b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 06/12/2022] [Indexed: 12/18/2022] Open
Abstract
Extracellular accumulation of β amyloid peptides of 40 (Aβ40) and 42 residues (Aβ42) has been considered as one of the hallmarks in the pathology of Alzheimer's disease. In this work, we are able to prepare oligomeric aggregates of Aβ with uniform size and monomorphic structure. Our experimental design is to incubate Aβ peptides in reverse micelles (RMs) so that the peptides could aggregate only through a single nucleation process and the size of the oligomers is confined by the physical dimension of the reverse micelles. The hence obtained Aβ oligomers (AβOs) are 23 nm in diameter and they belong to the category of high molecular-weight (MW) oligomers. The solid-state NMR data revealed that Aβ40Os adopt the structural motif of β-loop-β but the chemical shifts manifested that they may be structurally different from low-MW AβOs and mature fibrils. From the thioflavin-T results, we found that high-MW Aβ42Os can accelerate the fibrillization of Aβ40 monomers. Our protocol allows performing cross-seeding experiments among oligomeric species. By comparing the chemical shifts of Aβ40Os cross seeded by Aβ42Os and those of Aβ40Os prepared in the absence of Aβ42Os, we observed that the chemical states of E11, K16, and E22 were altered, whereas the backbone conformation of the β-sheet region near the C-terminus was structurally invariant. The use of reverse micelles allows hitherto the most detailed characterization of the structural variability of Aβ40Os. Extracellular accumulation of β amyloid peptides of 40 (Aβ40) and 42 residues (Aβ42) has been considered as one of the hallmarks in the pathology of Alzheimer's disease.![]()
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Affiliation(s)
- Han-Wen Chang
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Ho-I. Ma
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Yi-Shan Wu
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Ming-Che Lee
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Eric Chung-Yueh Yuan
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Shing-Jong Huang
- Instrumentation Center, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Yu-Sheng Cheng
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Meng-Hsin Wu
- Department of Chemistry, National Taiwan Normal University, No. 88, Section 4, Ting-Chow Road, Taipei, 11677, Taiwan
| | - Ling-Hsien Tu
- Department of Chemistry, National Taiwan Normal University, No. 88, Section 4, Ting-Chow Road, Taipei, 11677, Taiwan
| | - Jerry Chun Chung Chan
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
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14
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Chen Z, Yin Y, Cheng SQ, Sun Y, Liu Y. Construction of a caged single-molecule protein with ultra-stability. Chem 2021. [DOI: 10.1016/j.chempr.2021.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Nanomicellar Extraction of Polyphenols-Methodology and Applications Review. Int J Mol Sci 2021; 22:ijms222111392. [PMID: 34768823 PMCID: PMC8584012 DOI: 10.3390/ijms222111392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/11/2021] [Accepted: 10/19/2021] [Indexed: 11/17/2022] Open
Abstract
The selection of the appropriate extraction method is crucial, especially for the receiving of active substances from plant material. The extraction using supercritical liquids and micellar-mediated extraction (MME) is the most advantageous among the alternative methods to classical solid-liquid extraction. However, the latter seems to be the best solution when the desired actives are polar. The following article presents a comprehensive review of the micellar-mediated extraction method in the last decade. The theoretical principle of the process was also refreshed and the current state of knowledge on the applications for analytical and manufacturing purposes was summarized.
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17
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Enhanced Hydrodynamic Radius of AOT/n-heptane/Water Reverse Micellar System Through Altered Electrostatic Interactions and Molecular Self-Assemblies. J Fluoresc 2021; 31:1475-1488. [PMID: 34283329 DOI: 10.1007/s10895-021-02760-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 06/01/2021] [Indexed: 02/01/2023]
Abstract
We have demonstrated a unique approach to alter the aqueous pool size of an AOT/n-heptane/water reverse micellar system. A positively charged dye Rhodamine B (RhB) and negatively charged Rose Bengal (RB) were incorporated in the reverse micellar pool to investigate the effect of electrostatic interactions and stacking effects among the dye molecules on the AOT/n-heptane/water interface. Dynamic light scattering revealed increase in reverse micellar pool size in presence of positively charged dye aggregates at the oil-water interface. However, less expansion was observed in presence of negatively charged dye aggregates (RB). This confirms the role of electrostatic interaction in modulating the hydrodynamic radius. A head-to-tail type of stacking of RhB molecules at the interface favors this expansion. The differences in stacking of the two dyes inside the reverse micelles and their torsional mobility indicated the role of the reverse micellar interface and H-bonding ability of the microenvironment on dye aggregation. Conductivity measurements demonstrated a significant drop in percolation temperature of the reverse micellar system in presence of dye aggregates. This confirms the effect of dye aggregation and electrostatic interaction on such expansion. This strategy can be exploited for solubilizing greater amounts and a wider variety of drug molecules in microemulsions.
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Yao F, Chen FS, Du Y, Zhang Q, Zhu TW. Functional and structural properties of soy 11S globulin: Influence of reverse micelle extraction. J Food Sci 2021; 86:3403-3412. [PMID: 34287904 DOI: 10.1111/1750-3841.15820] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 05/22/2021] [Accepted: 05/28/2021] [Indexed: 11/26/2022]
Abstract
The effect of the reverse micelle extraction method (RMEM) on the physicochemical properties of soy 11S globulin was studied and compared with that of the traditional alkali solution-acid precipitation method (ASAPM). The results showed that the β-sheet structure content of soy 11S globulin obtained by RMEM was lower, while the β-turn structure content was higher compared with that obtained by ASAPM. Furthermore, the protein unfolding degree and surface hydrophobicity were lower than those observed using ASAPM. Therefore, RMEM better maintained the natural molecular structure of soy 11S globulin. The thermodynamic and rheological properties of soy 11S globulin obtained by these two methods were further compared, showing that the highest denaturation temperature and transition heat of soy 11S globulin extracted using ASAPM were different from those obtained using RMEM. Furthermore, soy 11S globulin extracted by RMEM showed stronger heat resistance and a higher denaturation temperature than that extracted by ASAPM. The final storage modulus and frequency sweep results showed that the gel formed by soy 11S globulin obtained using RMEM had high storage modulus and loss modulus. PRACTICAL APPLICATION: In this study, the effects of two different extraction methods on structural and functional properties of soy 11S globulin, such as thermodynamics and rheology, were investigated. We can know the 11S globulin extracted using the reverse micelle environment was more heat-resistant and heat-induced gel quality of 11S globulin was improved by the reverse micelle environment. These results will provide theoretical basis that would help determine the potential applications of soy 11S globulin in the food system.
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Affiliation(s)
- Fei Yao
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Fu-Sheng Chen
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Yan Du
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Qian Zhang
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
| | - Ting-Wei Zhu
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, China
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Fukuyama M, Suto M, Hibara A. Transport of Oligopeptide from Aqueous Phase to Span 80 Reverse Micelles in Microdroplet Array. ANAL SCI 2021; 37:753-758. [PMID: 33487599 DOI: 10.2116/analsci.20scp18] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The partitioning of water and tetramethylrhodamine-conjugated-10-residue oligopeptides from the aqueous phase of microdroplets into Span 80 reverse micelles was observed by utilizing microdroplet arrays. Each peptide was dissolved in phosphate buffer saline, and initially encapsulated in arrayed droplets. An organic phase containing the reverse micelles was added to the microdroplets. Here, the hydration degree of the reverse micelle was adjusted by contact of the organic phase with a 1.0 M NaCl aqueous solution or with a phosphate buffer saline before combining it with the microdroplets. For micelles treated with a 1.0 M NaCl, significant water transport from the microdroplet to the micelle was observed, and peptide with low solubility in water was transported to the reverse micelles, while those with high solubility in water were not. For micelles treated with phosphate buffer saline, the water transport was minimal, and no significant peptide transport was observed. These results suggest that the partitioning of low-solubility oligopeptides requires accompanying water transport to the reverse micelle phase.
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Affiliation(s)
- Mao Fukuyama
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
| | - Makoto Suto
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University.,Department of Chemistry, Graduate School of Science, Tohoku University
| | - Akihide Hibara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
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20
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Miller SL, Wiebenga-Sanford BP, Rithner CD, Levinger NE. Nanoconfinement Raises the Energy Barrier to Hydrogen Atom Exchange between Water and Glucose. J Phys Chem B 2021; 125:3364-3373. [PMID: 33784460 DOI: 10.1021/acs.jpcb.0c10681] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In bulk aqueous environments, the exchange of protons between labile hydroxyl groups typically occurs easily and quickly. Nanoconfinement can dramatically change this normally facile process. Through exchange spectroscopy (EXSY) NMR measurements, we observe that nanoconfinement of glucose and water within AOT (sodium bis(2-ethylhexyl) sulfosuccinate) reverse micelles raises the energy barrier to labile hydrogen exchange, which suggests a disruption of the hydrogen bond network. Near room temperature, we measure barriers high enough to slow the process by as much as 2 orders of magnitude. Although exchange rates slow with decreasing temperatures in these nanoconfined environments, the barrier we measure below ∼285 K is 3-5 times lower than the barrier measured at room temperature, indicating a change in mechanism for the process. These findings suggest the possibility of hydrogen tunneling at a surprisingly high-temperature threshold. Furthermore, differences in exchange rates depend on the hydroxyl group position on the glucose pyranose ring and suggest a net orientation of glucose at the reverse micelle interface.
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Affiliation(s)
- Samantha L Miller
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | | | - Christopher D Rithner
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Nancy E Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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21
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Versatility of Reverse Micelles: From Biomimetic Models to Nano (Bio)Sensor Design. Processes (Basel) 2021. [DOI: 10.3390/pr9020345] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
This paper presents an overview of the principal structural and dynamics characteristics of reverse micelles (RMs) in order to highlight their structural flexibility and versatility, along with the possibility to modulate their parameters in a controlled manner. The multifunctionality in a large range of different scientific fields is exemplified in two distinct directions: a theoretical model for mimicry of the biological microenvironment and practical application in the field of nanotechnology and nano-based sensors. RMs represent a convenient experimental approach that limits the drawbacks of the conventionally biological studies in vitro, while the particular structure confers them the status of simplified mimics of cells by reproducing a complex supramolecular organization in an artificial system. The biological relevance of RMs is discussed in some particular cases referring to confinement and a crowded environment, as well as the molecular dynamics of water and a cell membrane structure. The use of RMs in a range of applications seems to be more promising due to their structural and compositional flexibility, high efficiency, and selectivity. Advances in nanotechnology are based on developing new methods of nanomaterial synthesis and deposition. This review highlights the advantages of using RMs in the synthesis of nanoparticles with specific properties and in nano (bio)sensor design.
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22
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Sakai H, Harada M, Okada T. Reverse micelle chromatography for evaluation of partition of organic solutes to micellar pseudophases. J Colloid Interface Sci 2020; 577:191-198. [DOI: 10.1016/j.jcis.2020.05.074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/18/2020] [Accepted: 05/18/2020] [Indexed: 10/24/2022]
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Damarla K, Mehra S, Bahadur P, Ray D, Aswal VK, Kumar A. Versatile surface-active ionic liquid: construction of microemulsions and their applications in light harvesting. Phys Chem Chem Phys 2020; 22:8157-8163. [PMID: 32249857 DOI: 10.1039/c9cp06842b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article outlines a sustainable method towards the synthesis of advanced materials such as core/shell Quantum Dots (QDs) and their in situ stabilization using microemulsions (MEs). QDs are versatile materials which show unusual optical properties. We have constructed MEs consisting of an Ionic Liquid (IL) based surfactant i.e. choline dioctylsulfosuccinate, [Cho][AOT] as an emulsifier, toluene as a nonpolar phase and water as a polar phase. The system forms a large single-phase region in the phase diagram without any co-surfactant. Spontaneous formation of micelles has been observed and studied through tensiometry and fluorescence and isothermal titration calorimetry (ITC). The exceptional swelling behaviour of the MEs was studied using Dynamic Light Scattering (DLS) and small angle neutron scattering (SANS). In ME droplets, i.e. Reverse Micelles (RMs), we successfully synthesized spherical core/shell QDs (size ∼3 to ∼6 nm) with precise control over the size and morphology. The QDs have been characterized using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Powder X-ray Diffraction (PXRD). QDs stabilized in MEs exhibited excellent optical properties and can be suitably used as light harvesting materials for diverse applications.
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Affiliation(s)
- Krishnaiah Damarla
- CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg Bhavnagar-364002, Gujarat, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sanjay Mehra
- CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg Bhavnagar-364002, Gujarat, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Pratap Bahadur
- Department of Chemistry, V.N. South Gujarat University, Udhana-Magdalla Road, Surat 395 007, Gujarat, India
| | - Debes Ray
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - V K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Arvind Kumar
- CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg Bhavnagar-364002, Gujarat, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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Aggrawal R, Kumari S, Gangopadhyay S, Saha SK. Role of Different States of Solubilized Water on Solvation Dynamics and Rotational Relaxation of Coumarin 490 in Reverse Micelles of Gemini Surfactants, Water/12- s-12.2Br - ( s = 5, 6, 8)/ n-Propanol/Cyclohexane. ACS OMEGA 2020; 5:6738-6753. [PMID: 32258909 PMCID: PMC7114611 DOI: 10.1021/acsomega.0c00035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 03/04/2020] [Indexed: 06/07/2023]
Abstract
The present study demonstrates how the different states of solubilized water viz. quaternary ammonium headgroup-bound, bulklike, counterion-bound, and free water in reverse micelles of a series of cationic gemini surfactants, water/12-s-12 (s = 5, 6, 8).2Br-/n-propanol/cyclohexane, control the solvation dynamics and rotational relaxation of Coumarin 490 (C-490) and microenvironment of the reverse micelles. The relative number of solubilized water molecules of a given state per surfactant molecule decides major and minor components. A rapid increase in the number of bulklike water molecules per surfactant molecule as compared to the slow increase in the number of each of headgroup- and counterion-bound water molecules per surfactant molecule with increasing water content (W o) in a given reverse micellar system is responsible for the increase in the rate of solvation and rotational relaxation of C-490. The increase in the number of counterion-bound water molecules per surfactant molecule and the concomitant decrease in the number of bulklike water molecules per surfactant molecule with increasing spacer chain length of gemini surfactants at a given W o are ascribed to the slower rates of both solvation and rotational relaxation. Relative abundances of different states of water have a role on the microenvironment of the reverse micelles as well. Thus, a comprehensive effect of different states of water on dynamics in complex biomimicking systems has been presented here.
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Affiliation(s)
- Rishika Aggrawal
- Department
of Chemistry, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Sunita Kumari
- Department
of Chemistry, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Subhashis Gangopadhyay
- Department
of Physics, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Subit Kumar Saha
- Department
of Chemistry, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
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Fuglestad B, Gupta K, Wand AJ, Sharp KA. Water loading driven size, shape, and composition of cetyltrimethylammonium/hexanol/pentane reverse micelles. J Colloid Interface Sci 2019; 540:207-217. [PMID: 30640068 PMCID: PMC6391199 DOI: 10.1016/j.jcis.2019.01.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 01/03/2019] [Accepted: 01/04/2019] [Indexed: 02/06/2023]
Abstract
Cetyltrimethylammonium bromide (CTAB)/hexanol reverse micelles have found a variety of applications that demand control over physical parameters. Water content or loading is among the most basic tunable components and is the major driver of the physical properties of these systems. This study uses small-angle scattering with contrast variation to characterize these systems as a function of water loading. The scattering data were analyzed with a variety of approaches, resulting in converging physical specifications. Equations that describe basic physical parameters were determined that allow for characterization and manipulation of the CTAB/hexanol reverse micelle surfactant system. The shape of the reverse micelles was revealed to be slightly ellipsoidal and varies slightly through the water loading range. The surfactant shell is shown to contain a higher fraction of hexanol upon addition of water. Analysis reveals that the size, shape, and surfactant/cosurfactant composition are directly tunable by variation of the water content and that these properties are consequences of the balance of forces present in the reverse micelles.
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Affiliation(s)
- Brian Fuglestad
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States
| | - Kushol Gupta
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States
| | - A Joshua Wand
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States.
| | - Kim A Sharp
- Johnson Research Foundation and Department of Biochemistry & Biophysics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-6059, United States.
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28
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Mitsou E, Kalogianni EP, Georgiou D, Stamatis H, Xenakis A, Zoumpanioti M. Formulation and Structural Study of a Biocompatible Water-in-Oil Microemulsion as an Appropriate Enzyme Carrier: The Model Case of Horseradish Peroxidase. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:150-160. [PMID: 30521342 DOI: 10.1021/acs.langmuir.8b03124] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel biocompatible water-in-oil microemulsion was developed using nonionic surfactants and was investigated as a potential enzyme delivery system for pharmaceutical applications. The system was composed of isopropyl myristate/polysorbate 80 (Tween 80)/distilled monoglycerides/water/propylene glycol (PG), had a low total surfactant concentration (8.3% w/w), and was able to incorporate approximately 3% w/w aqueous phase containing horseradish peroxidase (HRP). Structural and activity aspects of the system were studied using a variety of techniques such as dynamic light scattering (DLS), electron paramagnetic resonance (EPR), and dynamic interfacial tension. The apparent hydrodynamic diameter of the empty droplets was calculated at about 37 nm. Different enzyme concentrations, ranging from 0.01 to 1.39 μM, were used for both DLS and EPR studies to effectively determine the localization of the macromolecule in the microemulsion. According to the results, for high enzyme concentrations, a participation of HRP in the surfactant monolayer of the microemulsion is evident. The number of reverse micelles in the microemulsion was defined by a theoretical model and was used to clarify how the enzyme concentration affects the number of empty and loaded reverse micelles. To assure that the system allows the enzyme to retain its catalytic activity, an oxidative reaction catalyzed by HRP was successfully carried out with the use of the model substrate 2,2'-azino-bis[3-ethylbenzothiazoline-6-sulfonic acid]. The influence of several parameters such as temperature, pH, and PG concentration was examined to optimize the reaction conditions, and a kinetic study was conducted revealing an ordered-Bi-Bi mechanism. Values of all kinetic parameters were determined. The release of the encapsulated enzyme was studied using an adequate receiver phase, revealing the effectiveness of the proposed microemulsion not only as a microreactor but also as a carrier for therapeutic biomolecules.
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Affiliation(s)
- Evgenia Mitsou
- Institute of Biology, Medicinal Chemistry & Biotechnology , National Hellenic Research Foundation , 48, Vassileos Constantinou Avenue , 11635 Athens , Greece
- Laboratory of Biotechnology, Department of Biological Applications and Technologies , University of Ioannina , 45110 Ioannina , Greece
| | - Eleni P Kalogianni
- Department of Food Technology , Alexander Technological Educational Institute of Thessaloniki , P.O. Box 141, 57400 Thessaloniki , Greece
| | - Despoina Georgiou
- Department of Food Technology , Alexander Technological Educational Institute of Thessaloniki , P.O. Box 141, 57400 Thessaloniki , Greece
| | - Haralambos Stamatis
- Laboratory of Biotechnology, Department of Biological Applications and Technologies , University of Ioannina , 45110 Ioannina , Greece
| | - Aristotelis Xenakis
- Institute of Biology, Medicinal Chemistry & Biotechnology , National Hellenic Research Foundation , 48, Vassileos Constantinou Avenue , 11635 Athens , Greece
| | - Maria Zoumpanioti
- Institute of Biology, Medicinal Chemistry & Biotechnology , National Hellenic Research Foundation , 48, Vassileos Constantinou Avenue , 11635 Athens , Greece
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Yıldırım A, Mudaber S, Öztürk S. Improved Sustainable Ionic Liquid Catalyzed Production of Symmetrical and Non‐Symmetrical Biological Wax Monoesters. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201800303] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ayhan Yıldırım
- Faculty of Arts and Sciences, Department of Chemistry, Bursa Uludağ University16059 BursaTurkey
| | - Sebghatullah Mudaber
- Faculty of Arts and Sciences, Department of Chemistry, Bursa Uludağ University16059 BursaTurkey
| | - Serkan Öztürk
- Faculty of Arts and Sciences, Department of Chemistry, Bursa Uludağ University16059 BursaTurkey
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30
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Fuglestad B, Marques BS, Jorge C, Kerstetter NE, Valentine KG, Wand AJ. Reverse Micelle Encapsulation of Proteins for NMR Spectroscopy. Methods Enzymol 2018; 615:43-75. [PMID: 30638537 PMCID: PMC6487188 DOI: 10.1016/bs.mie.2018.08.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Reverse micelle (RM) encapsulation of proteins for NMR spectroscopy has many advantages over standard NMR methods such as enhanced tumbling and improved sensitivity. It has opened many otherwise difficult lines of investigation including the study of membrane-associated proteins, large soluble proteins, unstable protein states, and the study of protein surface hydration dynamics. Recent technological developments have extended the ability of RM encapsulation with high structural fidelity for nearly all proteins and thereby allow high-quality state-of-the-art NMR spectroscopy. Optimal conditions are achieved using a streamlined screening protocol, which is described here. Commonly studied proteins spanning a range of molecular weights are used as examples. Very low-viscosity alkane solvents, such as propane or ethane, are useful for studying very large proteins but require the use of specialized equipment to permit preparation and maintenance of well-behaved solutions under elevated pressure. The procedures for the preparation and use of solutions of RMs in liquefied ethane and propane are described. The focus of this chapter is to provide procedures to optimally encapsulate proteins in reverse micelles for modern NMR applications.
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Affiliation(s)
- Brian Fuglestad
- Johnson Research Foundation and Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Bryan S Marques
- Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Christine Jorge
- Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Nicole E Kerstetter
- Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Kathleen G Valentine
- Johnson Research Foundation and Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - A Joshua Wand
- Johnson Research Foundation and Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
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31
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Cheng K, Wu Q, Zhang Z, Pielak GJ, Liu M, Li C. Crowding and Confinement Can Oppositely Affect Protein Stability. Chemphyschem 2018; 19:3350-3355. [DOI: 10.1002/cphc.201800857] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Kai Cheng
- Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan Collaborative Innovation Center of Chemistry for Life Sciences, Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China
| | - Qiong Wu
- Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan Collaborative Innovation Center of Chemistry for Life Sciences, Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China
| | - Zeting Zhang
- Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan Collaborative Innovation Center of Chemistry for Life Sciences, Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China
| | - Gary J. Pielak
- Department of Chemistry Department of Biochemistry and Biophysics University of North Carolina, Chapel Hill Chapel Hill, NC 27599-3290 USA
| | - Maili Liu
- Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan Collaborative Innovation Center of Chemistry for Life Sciences, Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China
| | - Conggang Li
- Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan Collaborative Innovation Center of Chemistry for Life Sciences, Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China
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32
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Wiebenga-Sanford BP, Washington JB, Cosgrove B, Palomares EF, Vasquez DA, Rithner CD, Levinger NE. Sweet Confinement: Glucose and Carbohydrate Osmolytes in Reverse Micelles. J Phys Chem B 2018; 122:9555-9566. [DOI: 10.1021/acs.jpcb.8b07406] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jack B. Washington
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Brett Cosgrove
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Eduardo F. Palomares
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Derrick A. Vasquez
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Christopher D. Rithner
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Nancy E. Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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Gallo PN, Iovine JC, Nucci NV. Toward comprehensive measurement of protein hydration dynamics: Facilitation of NMR-based methods by reverse micelle encapsulation. Methods 2018; 148:146-153. [PMID: 30048681 DOI: 10.1016/j.ymeth.2018.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/19/2018] [Accepted: 07/20/2018] [Indexed: 10/28/2022] Open
Abstract
Protein-water interactions are a fundamental determinant of protein structure and function. Despite their importance, the molecular details of water orientations and dynamics near protein surfaces remain poorly understood, largely due to the difficulty of measuring local water mobility near the protein in a site-resolved fashion. Solution NMR-based measurement of water mobility via the nuclear Overhauser effect was presented as a method for performing comprehensive, site-resolved measurements of water dynamics many years ago. Though this approach yielded extensive insight on the dynamics and locations of waters buried within proteins, its promise for measuring surface hydration dynamics was impeded by various technical barriers. Over the past several years, however, this approach has been pursued anew with the aid of reverse micelle encapsulation of proteins of interest. The confined environment of the reverse micelle resolves many of these barriers and permits site-resolved measurement of relative water dynamics across much of the protein surface. Here, the development of this strategy for measuring hydration dynamics is reviewed with particular focus on the important remaining challenges to its widespread application.
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Affiliation(s)
- Pamela N Gallo
- Department of Physics & Astronomy, Department of Molecular & Cellular Biosciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States
| | - Joseph C Iovine
- Department of Physics & Astronomy, Department of Molecular & Cellular Biosciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States
| | - Nathaniel V Nucci
- Department of Physics & Astronomy, Department of Molecular & Cellular Biosciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, United States.
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Nowicki J, Woch J, Łuczak J, Zarębska M, Nowakowska‐Bogdan E, Mościpan M. Micellar Route of the Synthesis of Alkyl Xylosides: An Unexpected Effect of Amphiphilic Imidazolium Ionic Liquids. ChemistrySelect 2018. [DOI: 10.1002/slct.201800125] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Janusz Nowicki
- Institute of Heavy Organic Synthesis, Blachownia” Energetyków 9 47-225 Kędzierzyn-Koźle Poland
| | - Julia Woch
- Institute of Heavy Organic Synthesis, Blachownia” Energetyków 9 47-225 Kędzierzyn-Koźle Poland
| | - Justyna Łuczak
- Department of ChemistryGdańsk University of Technology G. Narutowicza 11/12 80-233 Gdańsk Poland
| | - Magdalena Zarębska
- Institute of Heavy Organic Synthesis, Blachownia” Energetyków 9 47-225 Kędzierzyn-Koźle Poland
| | - Ewa Nowakowska‐Bogdan
- Institute of Heavy Organic Synthesis, Blachownia” Energetyków 9 47-225 Kędzierzyn-Koźle Poland
| | - Małgorzata Mościpan
- Institute of Heavy Organic Synthesis, Blachownia” Energetyków 9 47-225 Kędzierzyn-Koźle Poland
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Samanta P, Rane S, Bahadur P, Dutta Choudhury S, Pal H. Tetronic Star Block Copolymer Micelles: Photophysical Characterization of Microenvironments and Applicability for Tuning Electron Transfer Reactions. J Phys Chem B 2018; 122:6079-6093. [DOI: 10.1021/acs.jpcb.8b01778] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Papu Samanta
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | | | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University, Surat 395007, India
| | | | - Haridas Pal
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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Prabhu AA, Purkayastha A, Mandal B, Kumar JP, Mandal BB, Veeranki VD. A novel reverse micellar purification strategy for histidine tagged human interferon gamma (hIFN-γ) protein from Pichia pastoris. Int J Biol Macromol 2018; 107:2512-2524. [DOI: 10.1016/j.ijbiomac.2017.10.130] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/17/2017] [Accepted: 10/20/2017] [Indexed: 11/16/2022]
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37
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Dutta R, Pyne A, Sarkar N. Effect of sugars on the dynamics of hydrophilic fluorophores confined inside the water pool of anionic reverse micelle: A spectroscopic approach. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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38
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Desai RK, Monteillet H, Li X, Schuur B, Kleijn JM, Leermakers FAM, Wijffels RH, Eppink MHM. One-step mild biorefinery of functional biomolecules from microalgae extracts. REACT CHEM ENG 2018. [DOI: 10.1039/c7re00116a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fractionation of complex matrices such as biomass into diverse functional biomolecules without disrupting the biomolecule functionalities is a real challenge.
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Affiliation(s)
- Rupali K. Desai
- Bioprocess Engineering
- AlgaePARC
- Wageningen University
- Wageningen
- The Netherlands
| | - Hélène Monteillet
- Physical Chemistry and Soft Matter
- Wageningen University
- 6708 WE Wageningen
- The Netherlands
| | - Xiaohua Li
- Faculty of Science and Technology
- Sustainable Process and Technology Group
- Green Energy Initiative
- University of Twente
- 7500 AE Enschede
| | - Boelo Schuur
- Faculty of Science and Technology
- Sustainable Process and Technology Group
- Green Energy Initiative
- University of Twente
- 7500 AE Enschede
| | - J. Mieke Kleijn
- Physical Chemistry and Soft Matter
- Wageningen University
- 6708 WE Wageningen
- The Netherlands
| | - Frans A. M. Leermakers
- Physical Chemistry and Soft Matter
- Wageningen University
- 6708 WE Wageningen
- The Netherlands
| | - Rene H. Wijffels
- Bioprocess Engineering
- AlgaePARC
- Wageningen University
- Wageningen
- The Netherlands
| | - Michel H. M. Eppink
- Bioprocess Engineering
- AlgaePARC
- Wageningen University
- Wageningen
- The Netherlands
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39
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Mosayebi J, Kiyasatfar M, Laurent S. Synthesis, Functionalization, and Design of Magnetic Nanoparticles for Theranostic Applications. Adv Healthc Mater 2017; 6. [PMID: 28990364 DOI: 10.1002/adhm.201700306] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/14/2017] [Indexed: 12/13/2022]
Abstract
In order to translate nanotechnology into medical practice, magnetic nanoparticles (MNPs) have been presented as a class of non-invasive nanomaterials for numerous biomedical applications. In particular, MNPs have opened a door for simultaneous diagnosis and brisk treatment of diseases in the form of theranostic agents. This review highlights the recent advances in preparation and utilization of MNPs from the synthesis and functionalization steps to the final design consideration in evading the body immune system for therapeutic and diagnostic applications with addressing the most recent examples of the literature in each section. This study provides a conceptual framework of a wide range of synthetic routes classified mainly as wet chemistry, state-of-the-art microfluidic reactors, and biogenic routes, along with the most popular coating materials to stabilize resultant MNPs. Additionally, key aspects of prolonging the half-life of MNPs via overcoming the sequential biological barriers are covered through unraveling the biophysical interactions at the bio-nano interface and giving a set of criteria to efficiently modulate MNPs' physicochemical properties. Furthermore, concepts of passive and active targeting for successful cell internalization, by respectively exploiting the unique properties of cancers and novel targeting ligands are described in detail. Finally, this study extensively covers the recent developments in magnetic drug targeting and hyperthermia as therapeutic applications of MNPs. In addition, multi-modal imaging via fusion of magnetic resonance imaging, and also innovative magnetic particle imaging with other imaging techniques for early diagnosis of diseases are extensively provided.
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Affiliation(s)
- Jalal Mosayebi
- Department of Mechanical Engineering; Urmia University; Urmia 5756151818 Iran
| | - Mehdi Kiyasatfar
- Department of Mechanical Engineering; Urmia University; Urmia 5756151818 Iran
| | - Sophie Laurent
- Laboratory of NMR and Molecular Imaging; University of Mons; Mons Belgium
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Santalices I, Gonella A, Torres D, Alonso MJ. Advances on the formulation of proteins using nanotechnologies. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.06.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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41
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Kinugasa T, Okabe K, Jinno K, Uchida K, Nishii Y. Improvement of lysozyme recovery method from the precipitate of protein-anionic surfactant complexes. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1374971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Takumi Kinugasa
- Department of Applied Chemistry and Biotechnology, National Institute of Technology, Niihama College, Niihama, Japan
| | - Kanako Okabe
- Department of Applied Chemistry and Biotechnology, National Institute of Technology, Niihama College, Niihama, Japan
| | - Kenta Jinno
- Department of Applied Chemistry and Biotechnology, National Institute of Technology, Niihama College, Niihama, Japan
| | - Kiyohito Uchida
- Department of Applied Chemistry and Biotechnology, National Institute of Technology, Niihama College, Niihama, Japan
| | - Yasuhiro Nishii
- Department of Applied Chemistry and Biotechnology, National Institute of Technology, Niihama College, Niihama, Japan
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Fukuyama M, Hibara A, Yoshida Y, Maeda K. Kinetic Switching of the Concentration/Separation Behavior of Microdroplets. Anal Chem 2017; 89:9279-9283. [PMID: 28745495 DOI: 10.1021/acs.analchem.7b02062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work demonstrates that the solute concentration inside 100 micrometer-sized aqueous microdroplets can be controlled by adjusting the time required for the aqueous nanometer-sized droplets (nanodroplet) or reverse micelles to pass over the surface of the microdroplet. The kinetics of molecular transport between the microdroplets and the nanodroplets was investigated by utilizing a microdroplet array, and on the basis of these results, a control over the concentration selectivity of the contents of the microdroplet was achieved. This method is operationally simple and can be potentially applied as a pretreatment method for microanalytical systems that require high-density microdroplet arrays. This method can also be utilized for parallel small sample analyses such as single cell analysis.
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Affiliation(s)
- Mao Fukuyama
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology , 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.,PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Akihide Hibara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku Univesity , 2-1-1 Katahira, Aoba-ku Sendai 980-8577, Japan
| | - Yumi Yoshida
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology , 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kohji Maeda
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology , 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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43
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Crans DC, Peters BJ, Wu X, McLauchlan CC. Does anion-cation organization in Na+-containing X-ray crystal structures relate to solution interactions in inhomogeneous nanoscale environments: Sodium-decavanadate in solid state materials, minerals, and microemulsions. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yuan R, Yan C, Nishida J, Fayer MD. Dynamics in a Water Interfacial Boundary Layer Investigated with IR Polarization-Selective Pump–Probe Experiments. J Phys Chem B 2017; 121:4530-4537. [DOI: 10.1021/acs.jpcb.7b01028] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Rongfeng Yuan
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Chang Yan
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jun Nishida
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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Uppalapati D, Boyd BJ, Garg S, Travas-Sejdic J, Svirskis D. Conducting polymers with defined micro- or nanostructures for drug delivery. Biomaterials 2016; 111:149-162. [DOI: 10.1016/j.biomaterials.2016.09.021] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 09/21/2016] [Accepted: 09/29/2016] [Indexed: 11/29/2022]
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Gonçalves KM, Junior II, Papadimitriou V, Zoumpanioti M, Leal ICR, de Souza ROMA, Cordeiro Y, Xenakis A. Nanoencapsulated Lecitase Ultra and Thermomyces lanuginosus Lipase, a Comparative Structural Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6746-6756. [PMID: 27291999 DOI: 10.1021/acs.langmuir.6b00826] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Two commercially available and widely used enzymes, the parent Thermomyces lanuginosus lipase (TLL) and the shuffled phospholipase A1 Lecitase (Lecitase Ultra), were encapsulated in AOT/isooctane reverse micelles and evaluated regarding their structure and activity. Preparations were also tested as effective biocatalysts. Small-angle X-ray scattering (SAXS), electronic paramagnetic resonance (EPR), and fluorescence spectroscopy were the techniques applied to assess the effects of enzyme incorporation to a reverse micellar nanostructure. SAXS analysis showed that the radius of gyration (Rg) changed from 16 to 38 Å, as the water content (w0) increased. Elongated shapes were more commonly observed than spherical shapes after enzyme encapsulation. EPR studies indicated that enzymes do not participate in the interface, being located in the aqueous center. Fluorescence energy transfer showed that TLL is located in the water core, whereas Lecitase Ultra is closer to the interface. Enzymatic activity toward a standard esterification reaction endured after the enzyme was incorporated into the micelles. The activity of TLL for systems with w0 15 showed the highest conversion yield, 38% in 2 h, while the system with w0 10 showed the highest initial velocity, 0.43 μM/min. This last system had a Rg of 19.3 Å, similar to that of the TLL monomer. Lecitase Ultra showed the highest conversion yields in systems with w0 10, 55% in 2 h. However, the initial rate was much lower than that of TLL, suggesting less affinity for the substrates, which is expected since Lecitase Ultra is a phospholipase. In summary, we here used several spectroscopic and scattering techniques to reveal the shape and stability of TTL and Lecitase Ultra encapsulated systems, which allowed the selection of w0 values to provide optimized enzymatic activity.
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Affiliation(s)
- Karen M Gonçalves
- Faculty of Pharmacy, Federal University of Rio de Janeiro , Rio de Janeiro 21941-902, Brazil
| | - Ivaldo I Junior
- Biocatalysis and Organic Synthesis Group, Chemistry Institute, Federal University of Rio de Janeiro , Rio de Janeiro 21941-909, Brazil
- Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro , Rio de Janeiro 21941-909, Brazil
| | - Vassiliki Papadimitriou
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens 116 35, Greece
| | - Maria Zoumpanioti
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens 116 35, Greece
| | - Ivana C R Leal
- Faculty of Pharmacy, Federal University of Rio de Janeiro , Rio de Janeiro 21941-902, Brazil
| | - Rodrigo O M A de Souza
- Biocatalysis and Organic Synthesis Group, Chemistry Institute, Federal University of Rio de Janeiro , Rio de Janeiro 21941-909, Brazil
| | - Yraima Cordeiro
- Faculty of Pharmacy, Federal University of Rio de Janeiro , Rio de Janeiro 21941-902, Brazil
| | - Aristotelis Xenakis
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation , Athens 116 35, Greece
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48
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Single-Step Partial Purification of Intracellular β-Galactosidase from Kluyveromyces lactis Using Microemulsion Droplets. Appl Biochem Biotechnol 2016; 180:1000-1015. [DOI: 10.1007/s12010-016-2148-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Accepted: 05/25/2016] [Indexed: 10/21/2022]
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49
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Valle L, Morán Vieyra FE, Borsarelli CD. Nanoenvironmental effect in AOT reverse micelles on the triplet excited state properties of flavins and quenching by molecular oxygen. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Lorena Valle
- Instituto de Bionanotecnología, INBIONATEC-CONICET; Universidad Nacional de Santiago del Estero (UNSE); RN9, Km 1125 G4206XCP Santiago del Estero Argentina
| | - Faustino E. Morán Vieyra
- Instituto de Bionanotecnología, INBIONATEC-CONICET; Universidad Nacional de Santiago del Estero (UNSE); RN9, Km 1125 G4206XCP Santiago del Estero Argentina
| | - Claudio D. Borsarelli
- Instituto de Bionanotecnología, INBIONATEC-CONICET; Universidad Nacional de Santiago del Estero (UNSE); RN9, Km 1125 G4206XCP Santiago del Estero Argentina
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Küchler A, Yoshimoto M, Luginbühl S, Mavelli F, Walde P. Enzymatic reactions in confined environments. NATURE NANOTECHNOLOGY 2016; 11:409-20. [PMID: 27146955 DOI: 10.1038/nnano.2016.54] [Citation(s) in RCA: 453] [Impact Index Per Article: 56.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 03/04/2016] [Indexed: 05/17/2023]
Abstract
Within each biological cell, surface- and volume-confined enzymes control a highly complex network of chemical reactions. These reactions are efficient, timely, and spatially defined. Efforts to transfer such appealing features to in vitro systems have led to several successful examples of chemical reactions catalysed by isolated and immobilized enzymes. In most cases, these enzymes are either bound or adsorbed to an insoluble support, physically trapped in a macromolecular network, or encapsulated within compartments. Advanced applications of enzymatic cascade reactions with immobilized enzymes include enzymatic fuel cells and enzymatic nanoreactors, both for in vitro and possible in vivo applications. In this Review, we discuss some of the general principles of enzymatic reactions confined on surfaces, at interfaces, and inside small volumes. We also highlight the similarities and differences between the in vivo and in vitro cases and attempt to critically evaluate some of the necessary future steps to improve our fundamental understanding of these systems.
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Affiliation(s)
- Andreas Küchler
- Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Makoto Yoshimoto
- Department of Applied Molecular Bioscience, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
| | - Sandra Luginbühl
- Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
| | - Fabio Mavelli
- Chemistry Department, University 'Aldo Moro', Via Orabona 4, 70125 Bari, Italy
| | - Peter Walde
- Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, CH-8093 Zürich, Switzerland
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